Caffeine & L-Theanine®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Serving Size: 1–4 Vegetarian Capsule(s) · 1 per day

Not Present

• 

  Vali Caffeine 50mg and L-Theanine 100mg Pills

  VALI4.8(85)

  $22.99
• 

  VALI Time Release Caffeine 100mg Pills

  VALI4.9(23)

  $20.99
• 

  Vali Caffeine 50mg & L Theanine 100mg - Caffeine Pills & L-theanine

  eBay - kardiackid2164.8(85)

  $39.38
• 

  Nutricost Caffeine + L-Theanine Capsules

  Target4.7(1100)

  $13.95
• 

  VALI Electrolyte Salts

  VALI5.0(19)

  $24.99
• 

  Sports Research L-Theanine & Caffeine Softgels

  Walmart - Sports Research4.8(277)

  $22.95
• 

  Vitamatic L-Theanine 200mg Caffeine 100mg 120 Tablets

  Target4.4(93)

  $16.99
• 

  Valr Energy Nitrogen-Infused Energy Drink

  Walmart - VALR Energy

  $41.99

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• Best Vitamins For Me

  5.0 (31)

  Vitamin & supplements store

  14 South Ct, Nesconset, NY 11767

  Directions(631) 513-5382

• Vitamins Wellness

  Vitamin & supplements store

  2241 Horseblock Road, Medford, NY 11763

  Directions(631) 691-9000

• The Vitamin Shoppe

  4.4 (101)

  Vitamin & supplements store

  1320 Stony Brook Rd Ste 100, Stony Brook, NY 11790

  Directions(631) 689-8315

• GNC

  3.6 (11)

  Vitamin & supplements store

  2322 N Ocean Ave, Farmingville, NY 11738

  Directions(631) 736-7340

• Nutrition House

  4.9 (72)

  Vitamin & supplements store

  691 NY-25A, Miller Place, NY 11764

  Directions(631) 824-1203

• Energize Nutrition

  4.6 (80)

  Vitamin & supplements store

  652 Middle Country Rd, Selden, NY 11784

  Directions(631) 346-3643

• Nature's Value Inc

  4.4 (16)

  Manufacturer

  468 Mill Rd, Coram, NY 11727

  Directions(631) 846-2500

• Farmingville Nutrition

  5.0 (2)

  Vitamin & supplements store

  19 Park Pl, Farmingville, NY 11738

  Directions(631) 846-8271

• l-theanine: From tea leaf to trending supplement–does the science match the hype for brain health and relaxation?

  R Dashwood, F Visioli - Nutrition Research, 2025 - Elsevier

  … When combined with caffeine, l-theanine may improve … in the use of l-theanine supplements at pharmacologic doses by … behind this trending supplement for brain health and relaxation. …

  202526 citations

• Performance-enhancing effects of caffeine and L-Theanine among Iranian elite wrestlers: a focus on cognitive and specific physical performance

  R Razazan, M Hemmatinafar, B Imanian… - Journal of the …, 2025 - Taylor & Francis

  … L-theanine, a non-stimulant amino acid found in tea, may help … investigate the acute effects of caffeine, L-theanine, and their … study, healthy adult participants (n = 48) received 250 mg of …

  20257 citations

• … of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic …

  ER Payne, M Aceves-Martins, J Dubost… - Nutrition …, 2025 - academic.oup.com

  … caffeine improves accuracy in attentional tasks, 13 and the European Food Safety Authority (EFSA) provided a positive evaluation of a health … Caffeine intake has been shown to benefit …

  202514 citations

• Anti-stress, behavioural and magnetoencephalography effects of an L-theanine-based nutrient drink: a randomised, double-blind, placebo-controlled …

  DJ White, S De Klerk, W Woods, S Gondalia, C Noonan… - Nutrients, 2016 - mdpi.com

  … l-theanine and caffeine in isolation and combination and found little evidence in support of cognitive or mood effects of l-theanine in … benefits to mood and general health, l-theanine is …

  2016180 citations

• Metabolomic Signatures and Dietary Pathways Guiding Next-Generation Functional Foods for Esports Athletes

  M Chudasama, A Khan, RC Pradhan - Current Food Science and …, 2026 - Springer

  … rather than esports-validated biomarkers. Biomarkers … g) or L-theanine (200 mg) are administered to healthy young … L-theanine is commonly studied in combination with caffeine. …

  2026

• Contribution of nutritional and bioactive components of tea leaves in management of non-communicable chronic diseases: A comprehensive review

  TT Alemu, MA Abdullahi, N Abamecha, M Hamza - Discover Food, 2025 - Springer

  … with significant health and economic benefits, especially in … quality parameters, while caffeine and catechins provide the … that contribute to their health benefits. Not only bioactive …

  202517 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2023-02-21. DSLD Label ID: 284128. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.